// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
package com.yahoo.prelude.semantics.test;

import com.google.common.util.concurrent.MoreExecutors;
import com.yahoo.component.chain.Chain;
import com.yahoo.language.Linguistics;
import com.yahoo.language.simple.SimpleLinguistics;
import com.yahoo.search.Query;
import com.yahoo.prelude.semantics.RuleBase;
import com.yahoo.prelude.semantics.RuleBaseException;
import com.yahoo.prelude.semantics.SemanticSearcher;
import com.yahoo.search.Searcher;
import com.yahoo.search.rendering.RendererRegistry;
import com.yahoo.search.searchchain.Execution;
import com.yahoo.search.test.QueryTestCase;

import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.Executors;

/**
 * Tests semantic searching
 *
 * @author bratseth
 */
@SuppressWarnings("deprecation")
public abstract class RuleBaseAbstractTestCase extends junit.framework.TestCase {

    protected final String root="src/test/java/com/yahoo/prelude/semantics/test/rulebases/";
    protected final SemanticSearcher searcher;

    protected RuleBaseAbstractTestCase(String name,String ruleBaseName) {
        this(name,ruleBaseName,null);
    }

    protected RuleBaseAbstractTestCase(String name,String ruleBaseName,String automataFileName) {
        super(name);
        searcher = createSearcher(ruleBaseName,automataFileName);
    }

    public void setUp() {
    }

    protected SemanticSearcher createSearcher(String ruleBaseName,String automataFileName) {
        try {
            if (automataFileName!=null)
                automataFileName=root + automataFileName;
            RuleBase ruleBase = RuleBase.createFromFile(root + ruleBaseName,automataFileName);
            return new SemanticSearcher(ruleBase);
        } catch (Exception e) {
            throw new RuleBaseException("Initialization of rule base '" + ruleBaseName + "' failed",e);
        }
    }

    protected Query assertSemantics(String result, String input) {
        return assertSemantics(result, input, 0);
    }

    protected Query assertSemantics(String result, String input, int tracelevel) {
        return assertSemantics(result, input, tracelevel, Query.Type.ALL);
    }

    protected Query assertSemantics(String result, String input, int tracelevel, Query.Type queryType) {
        Query query=new Query("?query=" + QueryTestCase.httpEncode(input) + "&tracelevel=0&tracelevel.rules=" + tracelevel +
                             "&language=und&type=" + queryType.toString());
        return assertSemantics(result, query);
    }

    protected Query assertSemantics(String result, Query query) {
        System.out.println(query.getModel().getQueryTree());
        createExecution(searcher).search(query);
        assertEquals(result, query.getModel().getQueryTree().getRoot().toString());
        return query;
    }

    private Execution createExecution(Searcher searcher) {
        Execution.Context context = new Execution.Context(null, null, null, new RendererRegistry(MoreExecutors.directExecutor()), new SimpleLinguistics());
        return new Execution(chainedAsSearchChain(searcher), context);
    }

    private Chain<Searcher> chainedAsSearchChain(Searcher topOfChain) {
        List<Searcher> searchers = new ArrayList<>();
        searchers.add(topOfChain);
        return new Chain<>(searchers);
    }

}
